Digital simulation based method and system for testing relay protection function of intelligent substation

Abstract

The invention discloses a method and a system for automatically testing the relay protection function of an intelligent substation. The simulation system of the entire substation is realized in the mode that a simulation host machine is used for controlling digital relay protection and testing devices, a testing environment is provided, closed-loop testing on intelligent equipment is performed, the intelligent equipment with any scale of the substation can be tested in the mode that the simulation host machine is connected with the digital relay protection and testing devices, when tested equipment is added and the existing simulation system cannot meet the testing scale, the relay protection and testing devices in cascade connection are added to meet the testing requirement for intelligent equipment with larger scale, and besides, testing for a plurality of intelligent equipment can be realized, and the application prospect is better.

Description

technical field [0001] The invention relates to a digital simulation-based intelligent substation relay protection testing method and system, belonging to the technical field of intelligent power systems. Background technique [0002] With the gradual development of smart substation construction, digital new technologies such as electronic / optical transformers, IEEE1588 synchronous time synchronization, IEC61850-9-2 networking / point-to-point sampling have been widely used, and the development of communication technology and network technology has also subverted the Structural composition of traditional substations. At present, most smart substations adopt a three-layer equipment structure to realize integrated smart equipment applications, online monitoring applications, integrated applications of secondary equipment, and advanced functional applications. Compared with conventional substations, smart substations realize the interoperability of equipment from different manuf...

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Problems solved by technology

[0003] Since the smart substation has subverted the structural composition, operation mode and maintenance methods of the traditional substation, although the testing methods and debugging methods of the conventional substation are very mature, they cannot solve the emerging problems of the smart substation well.

At present, there is no relevant report on the research on the fully digital relay protection test system for smart substations. The test devices provided by domestic and foreign scientific research institutions and manufacturers often do not have the function of simulation calculation, and can only perform pre-stored signals in a certain order. Playback, some can only conduct simple open-loop tests for a single secondary device, and cannot simulate the dynamic process of the system and test multiple sets of devices, which restricts the development of smart substations

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